add cocoapods spec

cglm.podspec

@@ -0,0 +1,29 @@
+Pod::Spec.new do |s|
+
+  # Description
+  s.name         = "cglm"
+  s.version      = "0.4.4"
+  s.summary      = "📽 Optimized OpenGL/Graphics Math (glm) for C"
+  s.description  = <<-DESC
+cglm is math library for graphics programming for C. It is similar to original glm but it is written for C instead of C++ (you can use here too). See the documentation or README for all features.
+                   DESC
+
+  s.documentation_url = "http://cglm.readthedocs.io"
+
+  # Home
+  s.homepage     = "https://github.com/recp/cglm"
+  s.license      = { :type => "MIT", :file => "LICENSE" }
+  s.author       = { "Recep Aslantas" => "recp@acm.org" }
+
+  # Sources
+  s.source               = { :git => "https://github.com/recp/cglm.git", :tag => "v#{s.version}" }
+  s.source_files         = "src", "include/cglm/**/*.h"
+  s.public_header_files  = "include", "include/cglm/**/*.h"
+  s.private_header_files = "src/**/*.h"
+  s.exclude_files        = "src/win/*", "src/dllmain.c"
+  s.preserve_path        = "include"
+  s.header_mappings_dir  = "include"
+
+  # Linking
+  s.library = "m"
+end