remove the LC_ROOT hack from build sysroot

LC_ROOT does not seem to have any useful effect, but the
build sysroot is passed to shell scripts without expanding
the LC_ROOT make variable which breaks tests.

litecross/Makefile

@@ -51,7 +51,7 @@ FULL_TOOLCHAIN_CONFIG = --enable-languages=c,c++ \
 	--target=$(TARGET) --prefix= \
 	--libdir=/lib --disable-multilib \
 	--with-sysroot=$(SYSROOT) \
-	--with-build-sysroot='$$(LC_ROOT)/obj_sysroot' \
+	--with-build-sysroot=$(PWD)/obj_sysroot \
 	--enable-tls \
 	--disable-libmudflap --disable-libsanitizer \
 	--disable-gnu-indirect-function \
@@ -154,7 +154,7 @@ obj_toolchain/.lc_configured: | obj_toolchain src_toolchain
 	touch $@
 
 obj_toolchain/gcc/.lc_built: | obj_toolchain/.lc_configured obj_sysroot/usr obj_sysroot/lib64 obj_sysroot/include
-	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" LC_ROOT=$(PWD) all-gcc
+	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" all-gcc
 	touch $@
 
 obj_musl/.lc_configured: | obj_toolchain/gcc/.lc_built obj_musl src_musl
@@ -166,11 +166,11 @@ obj_sysroot/.lc_headers: | obj_musl/.lc_configured obj_sysroot
 	touch $@
 
 obj_toolchain/$(TARGET)/libgcc/.lc_configured: | obj_sysroot/.lc_headers
-	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" LC_ROOT=$(PWD) configure-target-libgcc
+	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" configure-target-libgcc
 	touch $@
 
 obj_toolchain/$(TARGET)/libgcc/libgcc.a: | obj_toolchain/$(TARGET)/libgcc/.lc_configured
-	cd $(dir $@) && $(MAKE) MAKE="$(MAKE)" LC_ROOT=$(PWD) libgcc.a
+	cd $(dir $@) && $(MAKE) MAKE="$(MAKE)" libgcc.a
 
 obj_musl/.lc_built: | obj_musl/.lc_configured
 	cd obj_musl && $(MAKE) $(MUSL_VARS)
@@ -181,14 +181,14 @@ obj_sysroot/.lc_libs: | obj_musl/.lc_built
 	touch $@
 
 obj_toolchain/.lc_built: | obj_toolchain/.lc_configured obj_toolchain/gcc/.lc_built
-	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" LC_ROOT=$(PWD)
+	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)"
 	touch $@
 
 install-musl: | obj_musl/.lc_built
 	cd obj_musl && $(MAKE) $(MUSL_VARS) DESTDIR=$(DESTDIR)$(OUTPUT)$(SYSROOT) install
 
 install-toolchain: | obj_toolchain/.lc_built
-	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" LC_ROOT=$(PWD) DESTDIR=$(DESTDIR)$(OUTPUT) install
+	cd obj_toolchain && $(MAKE) MAKE="$(MAKE)" DESTDIR=$(DESTDIR)$(OUTPUT) install
 	ln -sf $(TARGET)-gcc $(DESTDIR)$(OUTPUT)/bin/$(TARGET)-cc
 
 ifneq ($(LINUX_SRCDIR),)