target-gcc: remove useless copies of gcc

When doing the "make install" of target, three identical copies of gcc
are installed in $(TARGET_DIR)/usr/bin:

  039adcc582c365f12ba6fc5f96098128  arm-unknown-linux-uclibcgnueabi-gcc
  039adcc582c365f12ba6fc5f96098128  arm-unknown-linux-uclibcgnueabi-gcc-4.3.5
  039adcc582c365f12ba6fc5f96098128  gcc

This patch removes the first two copies and keeps only the common "gcc" one.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

toolchain/gcc/gcc-uclibc-4.x.mk

@@ -445,6 +445,9 @@ $(TARGET_DIR)/usr/bin/gcc: $(GCC_BUILD_DIR3)/.compiled
 	# Remove broken specs file (cross compile flag is set).
 	rm -f $(TARGET_DIR)/usr/$(GCC_LIB_SUBDIR)/specs
 
+	# Remove useless copies of gcc
+	rm -f $(TARGET_DIR)/usr/bin/$(REAL_GNU_TARGET_NAME)-gcc*
+
 	# Work around problem of missing syslimits.h
 	if [ ! -f $(TARGET_DIR)/usr/$(GCC_LIB_SUBDIR)/$(GCC_INCLUDE_DIR)/syslimits.h ]; then \
 		echo "warning: working around missing syslimits.h"; \