Fix parallel build

otherwise shared parts in src subdirectory can be built in parallel and build fails
on invalid MOC generated code or linker reports truncated .so files or other weird issues:
KeyLocationRecorder.cpp:44: multiple definition of '1Ev'
release-qemuarm/.obj/KeyLocationRecorder.o: In function 'no symbol':
:(.text+0xb8): undefined reference to 'xit'
:(.text.startup+0x60): undefined reference to 'xit'
release-qemux86/.obj/moc_CandidateBar.o: file not recognized: File truncated
release-qemux86/.obj/moc_IMEData.o: file not recognized: File truncated

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@palm.com>
Change-Id: Idb86a26e84ab3869fa4edf20b9aa4a5b01be50a8