Update casesi_compact_jump instruction length

Fixes autobuilder issue http://autobuild.buildroot.net/results/bc5/bc5100d6462af4e2805f2bc8d39c87a55d843e2b/

--->---
$ arc-linux-gcc -c -o wps_attr_parse.o -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -Os  -I.../host/usr/arc-buildroot-linux-uclibc/sysroot/usr/include/libnl3/ -I.../build/hostapd-2.2/src -I.../build/hostapd-2.2/src/utils wps_attr_parse.c
wps_attr_parse.s: Assembler messages:
wps_attr_parse.s:860: Error: operand out of range (512 is not between -512 and 511)
--->---

Fix is taken from current development branch of GCC for ARC and will be a
part of the next release of ARC tools, so at that point patch should be dropped.

https://github.com/foss-for-synopsys-dwc-arc-processors/gcc/commit/8e704c43cb50407ec79795f6f7459f09800b9f01

Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
---
 
diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
index 88b2e37..8e18703 100644
--- a/gcc/config/arc/arc.md
+++ b/gcc/config/arc/arc.md
@@ -3948,7 +3948,7 @@
   output_asm_insn (s, xop);
   return \"add_s %2,%2,pcl\n\tj_s%* [%2]\";
 }"
-  [(set_attr "length" "10")
+  [(set_attr "length" "12")
    (set_attr "type" "jump")
    (set_attr "iscompact" "true")
    (set_attr "cond" "nocond")])