[XS] Change in coreboot[master]: buildgcc: Match the string of downloading percentage more precisely

[Bao Zheng (Code Review)]

Attention is currently required from: Zheng Bao.

Hello Zheng Bao,

I'd like you to do a code review.
Please visit

https://review.coreboot.org/c/coreboot/+/78324?usp=email

to review the following change.

Change subject: buildgcc: Match the string of downloading percentage more precisely
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buildgcc: Match the string of downloading percentage more precisely

The command "wget" prints some hyperlink with "%", which will be
filtered in by previous regular expression. So we need to change to
match the string with exactly 2 digits and a percent symbol.

TEST:
echo 45%  | grep -o "<[0-9]{1,2}%"
  45%
echo 245% | grep -o "<[0-9]{1,2}%"
  <empty>
echo aa%  | grep -o "<[0-9]{1,2}%"
  <empty>

Change-Id: I6ef9e7c87fd4ee6cc707346954d91e6e3af3b939
Signed-off-by: Zheng Bao 
---
M util/crossgcc/buildgcc
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/24/78324/1

diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index ebc9fcb..9b2fbed 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -1060,7 +1060,7 @@
    	url=$1
    	printf "... ${red}  0%%"
    	wget --tries=3 "$url" 2>&1 | while read -r line; do
-			echo "$line" | grep -o "[0-9]+%" | awk '{printf("\b\b\b\b%4s", $1)}'
+			echo "$line" | grep -o "<[0-9]{1,2}%" | awk '{printf("\b\b\b\b%4s", $1)}'
    	done
    	printf "${NC}... "
    }