exprs for dynlib; indentation parsing

tests/tdllvar.nim

@@ -0,0 +1,16 @@
+import os
+
+proc getDllName: string = 
+  result = "mylib.dll"
+  if ExistsFile(result): return
+  result = "mylib2.dll"
+  if ExistsFile(result): return
+  quit("could not load dynamic library")
+
+proc myImport(s: cstring) {.cdecl, importc, dynlib: getDllName().}
+proc myImport2(s: int) {.cdecl, importc, dynlib: getDllName().}
+
+myImport("test2")
+myImport2(12)
+
+