contrib: remove CMakeCache.txt without changing the current directory

contrib/src/fluidlite/rules.mak

@@ -26,7 +26,7 @@ fluidlite: fluidlite-$(FLUID_HASH).tar.xz .sum-fluidlite
 	$(MOVE)
 
 .fluidlite: fluidlite toolchain.cmake
-	cd $< && rm -f CMakeCache.txt
+	rm -f $</CMakeCache.txt
 	cd $< && $(HOSTVARS) $(CMAKE)
 	+$(CMAKEBUILD) $< --target install
 	touch $@

contrib/src/libaribcaption/rules.mak

@@ -56,7 +56,7 @@ endif
 
 
 .libaribcaption: libaribcaption toolchain.cmake
-	cd $< && rm -f CMakeCache.txt
+	rm -f $</CMakeCache.txt
 	cd $< && $(HOSTVARS_PIC) $(CMAKE) $(LIBARIBCC_CONF)
 	+$(CMAKEBUILD) $< --target install
 	touch $@

contrib/src/mysofa/rules.mak

@@ -26,7 +26,7 @@ mysofa: libmysofa-$(MYSOFA_VERSION).tar.gz .sum-mysofa
 MYSOFA_CONF := -DBUILD_TESTS=OFF
 
 .mysofa: mysofa toolchain.cmake
-	cd $< && rm -f CMakeCache.txt
+	rm -f $</CMakeCache.txt
 	cd $< && $(HOSTVARS) $(CMAKE) $(MYSOFA_CONF)
 	+$(CMAKEBUILD) $< --target install
 	touch $@

contrib/src/projectM/rules.mak

@@ -41,7 +41,7 @@ PROJECTM_CONF := \
 		-DBUILD_PROJECTM_STATIC:BOOL=ON
 
 .projectM: projectM toolchain.cmake
-	cd $< && rm -f CMakeCache.txt
+	rm -f $</CMakeCache.txt
 	cd $< && $(HOSTVARS) $(CMAKE) . $(PROJECTM_CONF)
 	+$(CMAKEBUILD) $< --target install
 	-cd $<; cp Renderer/libRenderer.a MilkdropPresetFactory/libMilkdropPresetFactory.a $(PREFIX)/lib

contrib/src/spatialaudio/rules.mak

@@ -23,7 +23,7 @@ spatialaudio: spatialaudio-$(SPATIALAUDIO_VERSION).tar.bz2 .sum-spatialaudio
 SPATIALAUDIO_CONF := -DMYSOFA_ROOT_DIR=$(PREFIX) -DHAVE_MIT_HRTF=OFF
 
 .spatialaudio: spatialaudio toolchain.cmake
-	cd $< && rm -f CMakeCache.txt
+	rm -f $</CMakeCache.txt
 	cd $< && $(HOSTVARS) $(CMAKE) $(SPATIALAUDIO_CONF)
 	+$(CMAKEBUILD) $< --target install
 	touch $@