Make gyp to dump debug symbols for separate_debug_info builds

With this patch we get usable debug files.
This also makes qmake strip the core lirary from unneeded sysmbols
which is especially beneficial on embedded.

Change-Id: Ic1cadd87dbedb9817512a8b4f251cc3e43f028d1
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

src/core/core_module.pro

@@ -21,3 +21,7 @@ load(qt_module)
 CONFIG -= bsymbolic_functions
 
 contains(QT_CONFIG, egl): CONFIG += egl
+
+linux {
+    CONFIG(release, debug|release) | contains(QT_CONFIG, separate_debug_info): QMAKE_POST_LINK="cd $(DESTDIR) && $(STRIP) --strip-unneeded $(TARGET)"
+}

src/core/gyp_run.pro

@@ -20,6 +20,8 @@ cross_compile {
 GYP_CONFIG += disable_glibcxx_debug=1
 !webcore_debug: GYP_CONFIG += remove_webcore_debug_symbols=1
 
+linux:contains(QT_CONFIG, separate_debug_info): GYP_CONFIG += linux_dump_symbols=1
+
 # Append additional platform options defined in GYP_CONFIG
 for (config, GYP_CONFIG): GYP_ARGS += "-D $$config"