VS: Properly quote arguments in nasm.xml

Most arguments were quoted, but some weren't, causing problems if the
arguments contained whitespace.

In particular, the _STL_EXTRA_DISABLED_WARNINGS value takes spaces and
CMake's NASM support applies all add_definitions lines to NASM. The -D
flag is missing quotes, so projects using NASM and setting
_STL_EXTRA_DISABLED_WARNINGS break in the Visual Studio generator.

Likewise, the -o flag is missing quotes, which means filenames with
spaces do not work.

(The -U flag is unlikely to need quotes, but include them for
consistency.)

Extend the existing VSNASM test to cover these cases.

1 files changed, 2 insertions, 1 deletions

diff --git a/Tests/VSNASM/main.c b/Tests/VSNASM/main.c
index 18ddb78..b1401b6 100644
--- a/Tests/VSNASM/main.c
+++ b/Tests/VSNASM/main.c
@@ -1,5 +1,6 @@
 extern int foo(void);
+extern int bar(void);
 int main(void)
 {
-  return foo();
+  return foo() + bar();
 }