Add libnsgif

[melody-rs]

Specify library name and version: libnsgif/1.0

I am submitting this library since a couple of my projects use it, and I'm aware that a couple of others out there with conan use it too!

(Note I am not the author of this library or the recipe. I am uploading it on the behalf of a friend. The person who made the recipe doesn't have access to conan center yet, And we'd like to get it onto the index pretty quickly.)

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• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[CLAassistant]

All committers have signed the CLA.

[conan-center-bot]

Failure in build 23 (36ef6081cd4cd201542bd9790cc654c4eafe7b0f):

• libnsgif/1.0@:
  CI failed to create some packages (All logs)

  Logs for packageID 6af9cc7cb931c5ad942174fd7838eb655717c709:

  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=9
  os=Linux
  [options]
  libnsgif:shared=False
  

  ********************************************************************************
  conan install libnsgif/1.0@ --build=libnsgif --profile=/home/conan/w/BuildSingleReference/62957/8116faac-d4d5-47af-93f8-d74bd8a9c335/profile.txt
  ********************************************************************************
  Configuration:
  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=9
  os=Linux
  [options]
  libnsgif:shared=False
  [build_requires]
  [env]
  
  libnsgif/1.0: Forced build from source
  Installing package: libnsgif/1.0
  Requirements
      libnsgif/1.0 from local cache - Cache
  Packages
      libnsgif/1.0:6af9cc7cb931c5ad942174fd7838eb655717c709 - Build
  
  Installing (downloading, building) binaries...
  libnsgif/1.0: Copying sources to build folder
  libnsgif/1.0: Building your package in /home/conan/w/BuildSingleReference/.conan/data/libnsgif/1.0/_/_/build/6af9cc7cb931c5ad942174fd7838eb655717c709
  libnsgif/1.0: Generator cmake created conanbuildinfo.cmake
  libnsgif/1.0: Aggregating env generators
  [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
  [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
  libnsgif/1.0: Calling build()
  libnsgif/1.0: 
  libnsgif/1.0: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/libnsgif/1.0/_/_/build/6af9cc7cb931c5ad942174fd7838eb655717c709
  libnsgif/1.0: ERROR: Package '6af9cc7cb931c5ad942174fd7838eb655717c709' build failed
  libnsgif/1.0: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/libnsgif/1.0/_/_/build/6af9cc7cb931c5ad942174fd7838eb655717c709/cmake-build-release
  ERROR: libnsgif/1.0: Error in build() method, line 41
  	cmake = CMake(self)
  	ConanException: Usage of toolchain is only supported with 'cmake_find_package' or 'cmake_find_package_multi' generators
  

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^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}

[datalogics-robb]

Shouldn't the version be 0.2.1 ?

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This pull request has been automatically closed because it has not had recent activity. Thank you for your contributions.