build: remove single-use variable THIS_LIB

Replace the single use of THIS_LIB with its value.
Signed-off-by: Mans Rullgard <mans@mansr.com>

library.mak

@@ -5,7 +5,6 @@ include $(SRC_PATH)/common.mak
 LIBVERSION := $(lib$(NAME)_VERSION)
 LIBMAJOR   := $(lib$(NAME)_VERSION_MAJOR)
 INCINSTDIR := $(INCDIR)/lib$(NAME)
-THIS_LIB   := $(SUBDIR)$($(CONFIG_SHARED:yes=S)LIBNAME)
 
 all-$(CONFIG_STATIC): $(SUBDIR)$(LIBNAME)
 all-$(CONFIG_SHARED): $(SUBDIR)$(SLIBNAME)
@@ -92,7 +91,7 @@ endef
 
 $(eval $(RULES))
 
-$(EXAMPLES) $(TOOLS): $(THIS_LIB) $(DEP_LIBS)
+$(EXAMPLES) $(TOOLS): $(DEP_LIBS) $(SUBDIR)$($(CONFIG_SHARED:yes=S)LIBNAME)
 $(TESTPROGS): $(SUBDIR)$(LIBNAME) $(DEP_LIBS)
 
 examples: $(EXAMPLES)