Make print_cwd buildable on Windows

[amccarth]

Summary

Original code relied on POSIX feature. This change doesn't completely enable process_launch tests on Windows, but it's another step in the chain.

[zturner]

test/functionalities/process_launch/print_cwd.cpp

3 ↗

(On Diff #20903)

I think this should be _MSC_VER. mingw toolchains will still have <unistd.h> and getcwd. We compile all our tests with clang, which does define _MSC_VER when in MSABI compat mode. lgtm otherwise, I'll commit later.

[amccarth]

Makes sense. Changed to _MSC_VER. Thanks.

[zturner]

No worries, I would have changed it for you before submitting anyway :)
Thanks!

lldb/trunk/test/functionalities/process_launch/print_cwd.cpp

 #include <stdio.h>
+
+#ifdef _MSC_VER
+#define _CRT_NONSTDC_NO_WARNINGS
+#include <direct.h>
+#undef getcwd
+#define getcwd(buffer, length) _getcwd(buffer, length)
+#else
 #include <unistd.h>
+#endif
 
 int
 main (int argc, char **argv)
 {
   char buffer[1024];
 
   fprintf(stdout, "stdout: %s\n", getcwd(buffer, 1024));
   fprintf(stderr, "stderr: %s\n", getcwd(buffer, 1024));
 
   return 0;
 }