[PATCH] build-many-glibcs: Add a RISC-V config with most of the B extensions

[Palmer Dabbelt <palmer@rivosinc.com>]

We've had some B-related string optimizaitons show up over the past
year, but we don't have a configuration in build-many-glibcs that tests
them.  This adds Zba, Zbc, and Zbs -- it doesn't add Zbc, but IIUC
that's the common configuration.  To avoid blowing up the build count it
just adds rv64/lp64d.

Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
---
I haven't tested this at all, but figured I'd send it up for comments.
I'm not really sure what the bar should be for builds here, we kind of
just started with everything and then didn't add any more.
---
 scripts/build-many-glibcs.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index 3082522140..bbc153831e 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -396,6 +396,11 @@ class Context(object):
                         variant='rv64imafdc-lp64d',
                         gcc_cfg=['--with-arch=rv64imafdc', '--with-abi=lp64d',
                                  '--disable-multilib'])
+        self.add_config(arch='riscv64',
+                        os_name='linux-gnu',
+                        variant='rv64imafdcb-lp64d',
+                        gcc_cfg=['--with-arch=rv64imafdc_zba_zbb_zbs', '--with-abi=lp64d',
+                                 '--disable-multilib'])
         self.add_config(arch='s390x',
                         os_name='linux-gnu',
                         glibcs=[{},
-- 
2.42.0