install .pc files in libdir

Provided pkgconfig file contains interface description which is arch
dependent. In such cases .pc files should be installed in libdir.

Signed-off-by: Tomasz Kłoczko <kloczek@github.com>
Change-Id: Ibbc85ad4aee1ef014c409dfa63313873b590464b


[ROCm/ROCR-Runtime commit: a226542fc3]

projects/rocr-runtime/CMakeLists.txt

@@ -285,7 +285,7 @@ endif()
 # TODO: Add support for relocatable packages.
 configure_file ( libhsakmt.pc.in libhsakmt.pc @ONLY )
 
-install ( FILES ${CMAKE_CURRENT_BINARY_DIR}/libhsakmt.pc DESTINATION ${CMAKE_INSTALL_DATADIR}/pkgconfig COMPONENT devel)
+install ( FILES ${CMAKE_CURRENT_BINARY_DIR}/libhsakmt.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig COMPONENT devel)
 
 ###########################
 # Packaging directives