Merge pull request #277 from 1480c1/pkg-config-name pkg-config: use PROJECT_NAME instead of CMAKE_PROJECT_NAME

diff --git a/libcpuinfo.pc.in b/libcpuinfo.pc.in
index 3027da3..f9a9db6 100644
--- a/libcpuinfo.pc.in
+++ b/libcpuinfo.pc.in

@@ -3,7 +3,7 @@
 libdir=@libdir_for_pc_file@
 includedir=@includedir_for_pc_file@
 
-Name: lib@CMAKE_PROJECT_NAME@
+Name: lib@PROJECT_NAME@
 Description: Library to detect essential performance optimization information about host CPU.
 Version: 
 URL: @PROJECT_HOMEPAGE_URL@