util: Set two digit exponents for scientific notation.

By default, three digit exponents are printed on Windows.
Many unit tests in Open vSwitch expect two digit exponents.

Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>

lib/util.c

@@ -460,6 +460,7 @@ set_program_name__(const char *argv0, const char *version, const char *date,
     size_t max_len = strlen(argv0) + 1;
 
     SetErrorMode(GetErrorMode() | SEM_NOGPFAULTERRORBOX);
+    _set_output_format(_TWO_DIGIT_EXPONENT);
 
     if (program_name) {
         free(program_name);