--os:standalone works again

tests/manyloc/standalone/barebone.nim

@@ -0,0 +1,4 @@
+
+proc printf(frmt: cstring) {.varargs, header: "<stdio.h>", cdecl.}
+
+printf("hi %ld\n", 4777)

tests/manyloc/standalone/barebone.nimrod.cfg

@@ -0,0 +1,2 @@
+--os:standalone
+--deadCodeElim:on

tests/manyloc/standalone/panicoverride.nim

@@ -0,0 +1,19 @@
+
+proc printf(frmt: cstring) {.varargs, importc, header: "<stdio.h>", cdecl.}
+proc exit(code: int) {.importc, header: "<stdlib.h>", cdecl.}
+
+{.push stack_trace: off, profiler:off.}
+
+proc rawoutput(s: string) =
+  printf("%s\n", s)
+
+proc panic(s: string) =
+  rawoutput(s)
+  exit(1)
+
+# Alternatively we also could implement these 2 here:
+#
+# template sysFatal(exceptn: typeDesc, message: string)
+# template sysFatal(exceptn: typeDesc, message, arg: string)
+
+{.pop.}