CI: Maintenance

- Rename .travis dir to .ci, since it isn't just for Travis
- Convert Linux build scripts to posix sh
- Clean up some scripts per shellcheck

.travis/deploy-windows.sh

@@ -1,24 +0,0 @@
-#!/bin/sh -ex
-
-# BUILD_blablabla is Azure specific, so we wrap it for portability
-ARTIFACT_DIR="$BUILD_ARTIFACTSTAGINGDIRECTORY"
-
-# Remove unecessary files
-rm -f ./bin/rpcs3.exp ./bin/rpcs3.lib ./bin/rpcs3.pdb
-
-# Prepare compatibility database for packaging, as well as
-# certificate for ssl (auto-updater)
-curl -sL 'https://rpcs3.net/compatibility?api=v1&export' | iconv -t UTF-8 > ./bin/GuiConfigs/compat_database.dat
-curl -sL 'https://curl.haxx.se/ca/cacert.pem' > ./bin/cacert.pem
-
-# Package artifacts
-7z a -m0=LZMA2 -mx9 "$BUILD" ./bin/*
-
-# Generate sha256 hashes
-# Write to file for GitHub releases
-sha256sum "$BUILD" | awk '{ print $1 }' | tee "$BUILD.sha256"
-echo "$(cat "$BUILD.sha256");$(stat -c %s "$BUILD")B" > GitHubReleaseMessage.txt
-
-# Move files to publishing directory
-mv -- "$BUILD" "$ARTIFACT_DIR"
-mv -- "$BUILD.sha256" "$ARTIFACT_DIR"