[lldb/crashlog] Update frame regex matcher

This patch updates the regular expression matching stackframes in
crashlog to allow addresses that are 7 characters long and more (vs. 8
characters previously).

It changes the `0x[0-9a-fA-F]{7}[0-9a-fA-F]+` by `0x[0-9a-fA-F]{7,}`.

rdar://97684839

Differential Revision: https://reviews.llvm.org/D131032

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>

lldb/test/Shell/ScriptInterpreter/Python/Crashlog/Inputs/a.out.crash

@@ -31,7 +31,7 @@ Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
 0   a.out                         	@foo@ foo + 16 (test.c:3)
 1   a.out                         	@bar@ bar + 9 (test.c:6)
 2   a.out                         	@main@ main + 20 (test.c:8)
-3   libdyld.dylib                 	0x0000000100000000 start + 1
+3   libdyld.dylib                 	0x1000000 start + 1
 
 Thread 0 crashed with X86 Thread State (64-bit):
   rax: 0x0000000000000000  rbx: 0x0000000000000000  rcx: 0x00007ffee42d81d0  rdx: 0x00007ffee42d8080

lldb/test/Shell/ScriptInterpreter/Python/Crashlog/text.test

@@ -9,4 +9,5 @@
 # CHECK: [  0] {{.*}}out`foo + 16 at test.c
 # CHECK: [  1] {{.*}}out`bar + 8 at test.c
 # CHECK: [  2] {{.*}}out`main + 19 at test.c
+# CHECK: [  3] 0x{{[0]+}}1000000 start + 1
 # CHECK: rbp = 0x00007ffee42d8020