config.sub patch: Add arceb

[Joern Rennecke]

[Oops, sent this first to address@hidden

For Synopsys Designware ARC toolchains, users generally want either little
or big endian.  So we want separate configurations for big endian.

2013-02-25  Simon Cook  <address@hidden>

        Changes to build configuration to allow big endian ELF ARC toolchain
        * config.sub: Allow arceb as basic_machine.

diff --git a/config.sub b/config.sub
index 707e9e2..5da9a04 100755
--- a/config.sub
+++ b/config.sub
@@ -256,7 +256,7 @@ case $basic_machine in
        | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
        | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | 
alpha64pca5[67] \
        | am33_2.0 \
-       | arc \
+       | arc | arceb \
        | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
        | avr | avr32 \
        | be32 | be64 \
@@ -370,7 +370,7 @@ case $basic_machine in
        | aarch64-* | aarch64_be-* \
        | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
        | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
-       | alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
+       | alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
        | arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
        | avr-* | avr32-* \
        | be32-* | be64-* \