Fix invalid assembly directive caught by clang

Similar to the x86_64 changes a while back

i387/bsd_asm.h

@@ -89,7 +89,7 @@
 #define CNAME(csym)		_##csym
 #define HIDENAME(asmsym)	.asmsym
 #define _ENTRY(x) _START_ENTRY_WIN; \
-            .globl CNAME(x); .section .drectve; .ascii " -export:" #x; \
+            .globl CNAME(x); .section .drectve; .ascii " -export:", #x; \
             .section .text; .def CNAME(x); .scl 2; .type 32; .endef; CNAME(x):
 #endif