Replaced NO_SHARED_LIB & NO_STATIC_LIB with BUILD_SHARED_LIBS, BUILD_STATIC_LIBS, FORCE_STATIC_LIB & FORCE_SHARED_LIB. Added FORCE_USE_PIC.

Changes allow us to have a finer control over which parts of the tree are built with PIC.  Part of the static build branch landing.
Bug #46775 r=mcafee a=leaf

layout/inspector/src/Makefile.in

@@ -42,7 +42,6 @@ CPPSRCS=                               \
 	inFileSearch.cpp               \
 	$(NULL)
 
-override NO_SHARED_LIB=1
-override NO_STATIC_LIB=
+FORCE_STATIC_LIB = 1
 
 include $(topsrcdir)/config/rules.mk