Fix a build issue with RocksJava on ppc64le that was introduced in #6660

This was fixed in #7359 and this commit is just a partial back-port of the necessary parts of that PR.

Makefile

@@ -2091,13 +2091,6 @@ rocksdbjavastaticpublishcentral:
 jl/%.o: %.cc
 	$(AM_V_CC)mkdir -p $(@D) && $(CXX) $(CXXFLAGS) -fPIC -c $< -o $@ $(COVERAGEFLAGS)
 
-jl/crc32c_ppc.o: util/crc32c_ppc.c
-	$(AM_V_CC)$(CC) $(CFLAGS) -c $< -o $@
-
-jl/crc32c_ppc_asm.o: util/crc32c_ppc_asm.S
-	$(AM_V_CC)$(CC) $(CFLAGS) -c $< -o $@
-
-
 rocksdbjava: $(LIB_OBJECTS)
 	$(AM_V_GEN)cd java;$(MAKE) javalib;
 	$(AM_V_at)rm -f ./java/target/$(ROCKSDBJNILIB)
@@ -2159,7 +2152,7 @@ ifeq ($(HAVE_POWER8),1)
 $(OBJ_DIR)/util/crc32c_ppc.o: util/crc32c_ppc.c
 	$(AM_V_CC)$(CC) $(CFLAGS) -c $< -o $@
 
-+$(OBJ_DIR)/util/crc32c_ppc_asm.o: util/crc32c_ppc_asm.S
+$(OBJ_DIR)/util/crc32c_ppc_asm.o: util/crc32c_ppc_asm.S
 	$(AM_V_CC)$(CC) $(CFLAGS) -c $< -o $@
 endif
 $(OBJ_DIR)/%.o: %.cc
@@ -2205,7 +2198,7 @@ $(OBJ_DIR)/%.c.d: %.c
 	@$(CXX) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) \
 	  -MM -MT'$@' -MT'$(<:.c=.o)' "$<" -o '$@'
 
-+$(OBJ_DIR)/%.S.d: %.S
+$(OBJ_DIR)/%.S.d: %.S
 	@$(CXX) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) \
 	  -MM -MT'$@' -MT'$(<:.S=.o)' "$<" -o '$@'