build(linux): change system package installation order

This is to prevent an issue where insalling libssv-dev after running "apt update" would cause the GitHub runner to restart.

build_scripts/build.py

@@ -257,6 +257,11 @@ def execscript(filepath):
 		commands = [
 			# Required for the build script
 			"apt-get install python3",
+
+			# Required for Curl
+			# This has to be executed before "apt update", otherwise
+			# it will cause the GitHub runner to restart
+			"apt-get install libssl-dev",
 
 			# Required for Pragma core
 			"apt install build-essential",