better defaults for gcc/binutils

target/config/Config.in.binutils.choice

@@ -3,6 +3,10 @@
 
 choice
 prompt "Binutils version"
+default ADK_TOOLCHAIN_BINUTILS_2_20_1 if ADK_TARGET_ARCH_AVR32
+default ADK_TOOLCHAIN_BINUTILS_2_22 if ADK_TARGET_ARCH_BFIN
+default ADK_TOOLCHAIN_BINUTILS_2_22 if ADK_TARGET_ARCH_CRIS
+default ADK_TOOLCHAIN_BINUTILS_2_23_ARC if ADK_TARGET_ARCH_ARC
 default ADK_TOOLCHAIN_BINUTILS_2_25
 
 config ADK_TOOLCHAIN_BINUTILS_GIT

target/config/Config.in.gcc.choice

@@ -3,6 +3,11 @@
 
 choice
 prompt "GCC version"
+default ADK_TOOLCHAIN_GCC_4_7_4 if ADK_TARGET_ARCH_C6X
+default ADK_TOOLCHAIN_GCC_4_7_4 if ADK_TARGET_ARCH_CRIS
+default ADK_TOOLCHAIN_GCC_4_5_4 if ADK_TARGET_ARCH_BFIN
+default ADK_TOOLCHAIN_GCC_4_8_0_ARC if ADK_TARGET_ARCH_ARC
+default ADK_TOOLCHAIN_GCC_4_4_7 if ADK_TARGET_ARCH_AVR32
 default ADK_TOOLCHAIN_GCC_4_9_2
 
 config ADK_TOOLCHAIN_GCC_GIT