build-many-glibcs.py: --disable-gcov for gcc-first

This is also being tracked n GCC [1].

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100289

scripts/build-many-glibcs.py

@@ -1481,6 +1481,7 @@ class Config(object):
                          '--disable-threads',
                          '--disable-libatomic',
                          '--disable-decimal-float',
+                         '--disable-gcov',
                          '--disable-libffi',
                          '--disable-libgomp',
                          '--disable-libitm',