Build script: rename flag -s to -g

Author: bblanchon

build.sh

@@ -4,7 +4,7 @@ OS_NAMES="android|emscripten|ios|linux|mac|win"
 CPU_NAMES="arm|arm64|ppc64|x64|x86|wasm"
 ENV_NAMES="catalyst|device|musl|simulator"
 OS_ENV_COMBINATIONS="linux musl|ios (catalyst|device|simulator)"
-STEP_REGEX="[0-9]"
+STEP_REGEX="[0-9]|10"
 
 START_STEP=0
 
@@ -22,13 +22,13 @@ Arguments:
 
 Options:
   -b branch = Chromium branch (default=main)
-  -s 0-10   = Set start step (default=0)
+  -g 0-10   = Go immediately to step n (default=0)
   -d        = debug build
   -j        = enable v8"
   exit
 fi
 
-while getopts "b:djms:" OPTION
+while getopts "b:djmg:" OPTION
 do
   case $OPTION in
     b)
@@ -43,7 +43,7 @@ do
       export PDFium_ENABLE_V8=true
       ;;
 
-    s)
+    g)
       START_STEP="$OPTARG"
       ;;