contrib: Use 'python3' for python here too

Assume the host has a reasonable version of python rather
than attempting to find exactly version 3.12

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

contrib/linux_build_toolchain.sh

@@ -120,7 +120,7 @@ CT_LOG_EXTRA=y
 CT_LOG_LEVEL_MAX="EXTRA"
 CT_GDB_CROSS_PYTHON=y
 CT_GDB_CROSS_PYTHON_VARIANT=y
-CT_GDB_CROSS_PYTHON_BINARY="python3.12"
+CT_GDB_CROSS_PYTHON_BINARY="python3"
 CT_EXPERIMENTAL=y
 CT_ALLOW_BUILD_AS_ROOT=y
 CT_ALLOW_BUILD_AS_ROOT_SURE=y