[PATCH] RISC-V: Fix loss of function to script 'multilib-generator'

[Songhe Zhu <zhusonghe@eswincomputing.com>]

The arch 'rv32imac' will not be created when excuting
'./multilib-generator rv32imc-ilp32--a'

The output is:
MULTILIB_OPTIONS = march=rv32imc mabi=ilp32
MULTILIB_DIRNAMES = rv32imc ilp32
MULTILIB_REQUIRED = march=rv32imc/mabi=ilp32
MULTILIB_REUSE =

Analysis : The alts:['rv32imc', 'rv32imac'] will change
to ['rv32imac', 'rv32imc'] through function:unique(alts) processing,
This is the wrong alts should not be changed.
This patch fix it.

gcc/ChangLog:
	* config/riscv/multilib-generator: Adjusting the loop of 'alt' in 'alts'.

Signed-off-by: Songhe Zhu <zhusonghe@eswincomputing.com>
---
 gcc/config/riscv/multilib-generator | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/multilib-generator b/gcc/config/riscv/multilib-generator
index 9a6ce0223c9..0a3d4c07757 100755
--- a/gcc/config/riscv/multilib-generator
+++ b/gcc/config/riscv/multilib-generator
@@ -175,7 +175,7 @@ for cmodel in cmodels:
     # Drop duplicated entry.
     alts = unique(alts)
 
-    for alt in alts[1:]:
+    for alt in alts:
       if alt == arch:
         continue
       arches[alt] = 1
-- 
2.17.1