[release/branch 1/2] Bump version to 18.0.90.DATE-git.

Now that the GDB 18 branch has been created,
this commit bumps the version number in gdb/version.in to
18.0.90.DATE-git

For the record, the GDB 18 branch was created
from commit b737567fed7f672fd54b40967c6c0234ef257434.
---
 gdb/version.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/version.in b/gdb/version.in
index 85ad8ec5d85..1d7e6c743f1 100644
--- a/gdb/version.in
+++ b/gdb/version.in
@@ -1 +1 @@
-18.0.50.DATE-git
\ No newline at end of file
+18.0.90.DATE-git
\ No newline at end of file
-- 
2.25.4