Ignore deprecation in C API build.

Author: fangerer

graalpython/com.oracle.graal.python.cext/setup.py

@@ -47,7 +47,13 @@
 import _sysconfig
 
 __dir__ = __file__.rpartition("/")[0]
-cflags_warnings = ["-Wno-int-to-pointer-cast", "-Wno-int-conversion", "-Wno-incompatible-pointer-types-discards-qualifiers", "-Wno-pointer-type-mismatch", "-Wno-braced-scalar-init"]
+cflags_warnings = [ "-Wno-int-to-pointer-cast"
+                  , "-Wno-int-conversion"
+                  , "-Wno-incompatible-pointer-types-discards-qualifiers"
+                  , "-Wno-pointer-type-mismatch"
+                  , "-Wno-braced-scalar-init"
+                  , "-Wno-deprecated-declarations"
+                  ]
 libpython_name = "libpython"
 libhpy_name = "libhpy"