Fix section switching buglet, by Edgar E. Iglesias.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3899 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/main.c

@@ -53,7 +53,8 @@ asm(".globl __preinit_array_start\n"
     "__init_array_end:\n"
     "__fini_array_start:\n"
     "__fini_array_end:\n"
-    ".long 0\n");
+    ".long 0\n"
+    ".previous\n");
 #endif
 
 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so