[x265] [PATCH ] Fix install symbol files

[mythreyi at multicorewareinc.com]

# HG changeset patch
# User Mythreyi P
# Date 1510910772 -19800
#      Fri Nov 17 14:56:12 2017 +0530
# Node ID 4ad31bed996f295f0ef1049f45a19bf326811afb
# Parent  e7254af562ee4cf29d559f85dbd2f3d17791b6d4
Fix install symbol files

.pdb files are installed only in Windows.

diff -r e7254af562ee -r 4ad31bed996f source/CMakeLists.txt
--- a/source/CMakeLists.txt	Fri Nov 17 13:27:11 2017 +0530
+++ b/source/CMakeLists.txt	Fri Nov 17 14:56:12 2017 +0530
@@ -546,10 +546,14 @@
         ARCHIVE DESTINATION ${LIB_INSTALL_DIR})
 endif()
 install(FILES x265.h "${PROJECT_BINARY_DIR}/x265_config.h" DESTINATION include)
-install(FILES "${PROJECT_BINARY_DIR}/Debug/x265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS Debug)
-install(FILES "${PROJECT_BINARY_DIR}/RelWithDebInfo/x265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS RelWithDebInfo)
-install(FILES "${PROJECT_BINARY_DIR}/Debug/libx265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS Debug OPTIONAL NAMELINK_ONLY)
-install(FILES "${PROJECT_BINARY_DIR}/RelWithDebInfo/libx265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS RelWithDebInfo OPTIONAL NAMELINK_ONLY)
+
+if(WIN32)
+    install(FILES "${PROJECT_BINARY_DIR}/Debug/x265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS Debug)
+    install(FILES "${PROJECT_BINARY_DIR}/RelWithDebInfo/x265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS RelWithDebInfo)
+    install(FILES "${PROJECT_BINARY_DIR}/Debug/libx265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS Debug OPTIONAL NAMELINK_ONLY)
+    install(FILES "${PROJECT_BINARY_DIR}/RelWithDebInfo/libx265.pdb" DESTINATION ${BIN_INSTALL_DIR} CONFIGURATIONS RelWithDebInfo OPTIONAL NAMELINK_ONLY)
+endif()
+
 if(CMAKE_RC_COMPILER)
     # The resource compiler does not need CFLAGS or macro defines. It
     # often breaks them