Add compiler options that may make the builds faster

Sometimes compiler options can help doing faster builds; for GCC the
pipe option will help interleave the various stages of the build.

cmake/Modules/UseFastBuilds.cmake

@@ -0,0 +1,8 @@
+# - Try to build faster depending on the compiler
+
+# faster builds by using a pipe instead of temp files
+include (AddOptions)
+if (CMAKE_COMPILER_IS_GNUCXX)
+	add_options (ALL_LANGUAGES ALL_BUILDS "-pipe")
+endif (CMAKE_COMPILER_IS_GNUCXX)
+