webkitgtk: Use linker options to reduce memory overhead during linking

Helps builds on machines with less RAM ( 8G )

(From OE-Core rev: 6ff409d0d70b2ee0580d948c9fe50a1c9f224ac6)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-sato/webkit/webkitgtk/reduce-memory-overheads.patch

@@ -0,0 +1,22 @@
+From: Alberto Garcia <berto@igalia.com>
+Subject: Reduce memory usage when not using the Gold linker
+Bug-Debian: https://bugs.debian.org/949621
+Forwarded: no
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+--- a/Source/cmake/OptionsCommon.cmake
++++ b/Source/cmake/OptionsCommon.cmake
+@@ -95,6 +95,12 @@ option(GCC_OFFLINEASM_SOURCE_MAP
+   "Produce debug line information for offlineasm-generated code"
+   ${GCC_OFFLINEASM_SOURCE_MAP_DEFAULT})
+ 
++# Pass --reduce-memory-overheads to the bfd linker in order to save memory
++if (NOT USE_LD_GOLD)
++    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--reduce-memory-overheads")
++    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--reduce-memory-overheads")
++endif ()
++
+ # Enable the usage of OpenMP.
+ #  - At this moment, OpenMP is only used as an alternative implementation
+ #    to native threads for the parallelization of the SVG filters.

meta/recipes-sato/webkit/webkitgtk_2.30.5.bb

@@ -18,6 +18,7 @@ SRC_URI = "https://www.webkitgtk.org/releases/${BPN}-${PV}.tar.xz \
            file://0001-Fix-build-with-musl.patch \
            file://include_array.patch \
            file://include_xutil.patch \
+           file://reduce-memory-overheads.patch \
            "
 SRC_URI[sha256sum] = "7d0dab08e3c5ae07bec80b2822ef42e952765d5724cac86eb23999bfed5a7f1f"