Fix gdb.ada/O2_float_param.exp for PowerPC

The frame command on Power pc prints the address in hex between the
#0 and in calle.increment.  For example

(gdb) frame
#0  0x0000000010010a88 in callee.increment (val=val@entry=99.0, msg=...)
    at /home/.../gdb/testsuite/gdb.ada/O2_float_param/callee.adb:19
19	   procedure Increment (Val : in out Float; Msg: String) is

The printing of the address for the frame is done by function
print_frame in gdb/stack.c.  If SAL.IS_stmt is false for the frame,
function frame_show_address returns true and print_frame prints the
address.  Currently, SAL.IS is false on PowerPC and true on X86-64.

Update the set re string to accept the hex address if it exits.

Fixes two failures on PowerPC.

Patch tested on Power10 with no new regressions.

Approved-By: Tom Tromey <tom@tromey.com>

gdb/testsuite/gdb.ada/O2_float_param.exp

@@ -39,8 +39,15 @@ foreach_with_prefix scenario {all minimal} {
 
     runto "increment"
 
+    # If sal.is_stmt is false for the frame, function frame_show_address will
+    # return true and function print_frame in gdb/stack.c will print the
+    # address.  In this case, the output will look something like:
+    # #0  0x0000000010010a88 in callee.increment (val=val@entry=99.0, msg=...)
+    # This situation currently occurs on PowerPC but not on X86-64.
+    # The re string needs to account for the possibility that the address
+    # will be printed.
     set re \
-	"#0\\s+callee\\.increment \\(val(=val@entry)?=99\\.0, msg=\\.\\.\\.\\).*"
+	"#0.*callee\\.increment \\(val(=val@entry)?=99\\.0, msg=\\.\\.\\.\\).*"
     set re_different_entry_val \
        "#0\\s+callee\\.increment \\(val=99.0, val@entry=.*, msg=\\.\\.\\.\\).*"
     gdb_test_multiple "frame" "" {