Bump version to 17.0.50.DATE-git.

Now that the GDB 16 branch has been created,
this commit bumps the version number in gdb/version.in to
17.0.50.DATE-git

For the record, the GDB 16 branch was created
from commit ee29a3c4ac7adc928ae6ed1fed3b59c940a519a4.

Also, as a result of the version bump, the following changes
have been made in gdb/testsuite:

	* gdb.base/default.exp: Change $_gdb_major to 17.
diff --git a/gdb/testsuite/gdb.base/default.exp b/gdb/testsuite/gdb.base/default.exp
index b1cf957..bbc95aa 100644
--- a/gdb/testsuite/gdb.base/default.exp
+++ b/gdb/testsuite/gdb.base/default.exp
@@ -691,7 +691,7 @@
 	{$_gdb_maint_setting = <internal function _gdb_maint_setting>} \
 	{$_gdb_setting_str = <internal function _gdb_setting_str>} \
 	{$_gdb_setting = <internal function _gdb_setting>} \
-	{$_gdb_major = 16} \
+	{$_gdb_major = 17} \
 	{$_gdb_minor = 1} \
 	{$_shell_exitsignal = void} \
 	{$_shell_exitcode = 0} \
diff --git a/gdb/version.in b/gdb/version.in
index 48f1b84..75e06a8 100644
--- a/gdb/version.in
+++ b/gdb/version.in
@@ -1 +1 @@
-16.0.50.DATE-git
\ No newline at end of file
+17.0.50.DATE-git
\ No newline at end of file