Add support for , as comma separator in numbers in GC parsing

[alfh]

In java 8, if I run my JVM with option
"
LC_ALL=nb_NO.UTF-8
export LC_ALL
"
then the gc.log output will actually use the locale based comma separator, which is "," in Norway, and not ".", which is used in US, for example.

So the output will look like this

2015-01-07T08:56:11.600+0100: 2,066: [CMS-concurrent-sweep-start]
2015-01-07T08:56:11.604+0100: 2,070: [CMS-concurrent-sweep: 0,004/0,004 secs] [Times: user=0,03 sys=0,00, real=0,01 secs] 
2015-01-07T08:56:11.604+0100: 2,070: [CMS-concurrent-reset-start]
2015-01-07T08:56:11.612+0100: 2,079: [CMS-concurrent-reset: 0,009/0,009 secs] [Times: user=0,06 sys=0,00, real=0,01 secs] 
2015-01-07T08:56:11.856+0100: 2,323: [GC (GCLocker Initiated GC) 2,323: [ParNew: 157248K->17472K(157248K), 0,0473640 secs] 164764K->66538K(506816K), 0,0474922 secs] [Times: user=0,22 sys=0,02, real=0,05 secs] 
2015-01-07T08:56:12.509+0100: 2,976: [GC (Allocation Failure) 2,976: [ParNew: 157248K->17472K(157248K), 0,0404206 secs] 206314K->98925K(506816K), 0,0405876 secs] [Times: user=0,17 sys=0,00, real=0,04 secs] 
2015-01-07T08:56:12.805+0100: 3,272: [GC (Allocation Failure) 3,272: [ParNew: 157248K->17471K(157248K), 0,0183367 secs] 238701K->111936K(506816K), 0,0184680 secs] [Times: user=0,08 sys=0,00, real=0,02 secs] 
2015-01-07T08:56:13.115+0100: 3,581: [GC (Allocation Failure) 3,581: [ParNew: 157247K->17471K(157248K), 0,0295748 secs] 251713K->128191K(506816K), 0,0297208 secs] [Times: user=0,10 sys=0,00, real=0,03 secs] 
2015-01-07T08:56:13.145+0100: 3,612: [GC (GCLocker Initiated GC) 3,612: [ParNew: 18456K->3411K(157248K), 0,0170746 secs] 129175K->126195K(506816K), 0,0171955 secs] [Times: user=0,06 sys=0,00, real=0,01 secs] 
2015-01-07T08:56:13.763+0100: 4,229: [GC (Allocation Failure) 4,229: [ParNew: 143187K->17472K(157248K), 0,0183644 secs] 265971K->143571K(506816K), 0,0185260 secs] [Times: user=0,08 sys=0,00, real=0,02 secs] 
2015-01-07T08:56:14.588+0100: 5,054: [GC (Allocation Failure) 5,055: [ParNew: 157248K->17471K(157248K), 0,0382582 secs] 283347K->162212K(506816K), 0,0384162 secs] [Times: user=0,20 sys=0,01, real=0,04 secs] 
2015-01-07T08:56:15.850+0100: 6,317: [GC (Allocation Failure) 6,317: [ParNew: 157247K->17471K(157248K), 0,0238880 secs] 301988K->175209K(506816K), 0,0240566 secs] [Times: user=0,12 sys=0,00, real=0,03 secs] 

And this causes the parsing of gc.log to not have any matches.

So I think the regular expressions should support either "," or "." as comma separator in numbers.