sim: fix the PKGVERSION define

This should be SIM, not GDB.

sim/v850/configure

@@ -1429,7 +1429,7 @@ Optional Packages:
   --with-pic              try to use only PIC/non-PIC objects [default=use
                           both]
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
-  --with-pkgversion=PKG   Use PKG in the version string in place of "GDB"
+  --with-pkgversion=PKG   Use PKG in the version string in place of "SIM"
   --with-bugurl=URL       Direct users to URL to report a bug
 
 Some influential environment variables:
@@ -12808,7 +12808,7 @@ if test "${with_pkgversion+set}" = set; then :
       *)   PKGVERSION="($withval) " ;;
      esac
 else
-  PKGVERSION="(GDB) "
+  PKGVERSION="(SIM) "
 
 fi