Add build manifests for various Linux distributions (#1257)

This change adds various build manifests that will be used by sourcehut builds.
It tests the installation of Ebiten on the following distros:

* Alpine Linux
* Arch Linux
* Debian
* Fedora
* Ubuntu

Fixes #1147

.builds/alpine.yml

@@ -0,0 +1,17 @@
+image: alpine/latest
+packages:
+  - alsa-lib-dev
+  - libx11-dev
+  - libxrandr-dev
+  - libxcursor-dev
+  - libxinerama-dev
+  - libxi-dev
+  - mesa-dev
+  - pkgconf
+  - go
+sources:
+  - https://github.com/hajimehoshi/ebiten
+tasks:
+  - build: |
+      cd ebiten
+      go build . ./audio

.builds/arch.yml

@@ -0,0 +1,16 @@
+image: archlinux
+packages:
+  - alsa-lib
+  - mesa
+  - libxrandr
+  - libxcursor
+  - libxinerama
+  - libxi
+  - pkg-config
+  - go
+sources:
+  - https://github.com/hajimehoshi/ebiten
+tasks:
+  - build: |
+      cd ebiten
+      go build . ./audio

.builds/debian.yml

@@ -0,0 +1,19 @@
+image: debian/testing
+packages:
+  - libc6-dev
+  - libglu1-mesa-dev
+  - libgl1-mesa-dev
+  - libxcursor-dev
+  - libxi-dev
+  - libxinerama-dev
+  - libxrandr-dev
+  - libxxf86vm-dev
+  - libasound2-dev
+  - pkg-config
+  - golang
+sources:
+  - https://github.com/hajimehoshi/ebiten
+tasks:
+  - build: |
+      cd ebiten
+      go build . ./audio

.builds/fedora.yml

@@ -0,0 +1,18 @@
+image: fedora/rawhide
+packages:
+  - mesa-libGLU-devel
+  - mesa-libGLES-devel
+  - libXrandr-devel
+  - libXcursor-devel
+  - libXinerama-devel
+  - libXi-devel
+  - libXxf86vm-devel
+  - alsa-lib-devel
+  - pkg-config
+  - go
+sources:
+  - https://github.com/hajimehoshi/ebiten
+tasks:
+  - build: |
+      cd ebiten
+      go build . ./audio

.builds/ubuntu.yml

@@ -0,0 +1,19 @@
+image: ubuntu/lts
+packages:
+  - libc6-dev
+  - libglu1-mesa-dev
+  - libgl1-mesa-dev
+  - libxcursor-dev
+  - libxi-dev
+  - libxinerama-dev
+  - libxrandr-dev
+  - libxxf86vm-dev
+  - libasound2-dev
+  - pkg-config
+  - golang
+sources:
+  - https://github.com/hajimehoshi/ebiten
+tasks:
+  - build: |
+      cd ebiten
+      go build . ./audio