cmake: only set -pie if -fPIC is set, also fixes an harmless typo

Author: illwieckz

cmake/DaemonFlags.cmake

@@ -395,11 +395,13 @@ else()
 		try_c_cxx_flag(WSTACK_PROTECTOR "-Wstack-protector")
 
 		if (NOT NACL OR (NACL AND GAME_PIE))
-			try_c_cxx_flag(FPIE "-fPIC")
+			try_c_cxx_flag(FPIC "-fPIC")
 
+			# The -pie flag requires -fPIC:
+			# > ld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
 			# This flag isn't used on macOS:
 			# > clang: warning: argument unused during compilation: '-pie' [-Wunused-command-line-argument]
-			if (NOT APPLE)
+			if (FLAG_FPIC AND NOT APPLE)
 				try_exe_linker_flag(LINKER_PIE "-pie")
 			endif()
 		endif()