initial buildroot for linux 5.15

package/mg/Config.in

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+config BR2_PACKAGE_MG
+	bool "mg"
+	depends on BR2_USE_MMU # fork()
+	help
+	  Emacs-like text editor (130 kiB)
+
+	  Mg is a MicroEMACS clone with the goal of being compatible
+	  with GNU Emacs, because there should never be any reason to
+	  learn more than one Emacs flavor.
+
+	  Unlike many other editors it does not require ncurses, only a
+	  standard C library, making it suitable for really small and
+	  embedded systems.
+
+	  This version is based on mg2a from OpenBSD, with more features
+	  and, in particular, no requirement on ncurses or termcap.
+
+	  https://github.com/troglobit/mg/

package/mg/mg.hash

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+# From https://github.com/troglobit/mg/releases/tag/v3.5
+sha256 a906eab9370c0f24a5fa25923561ad933b74ad339d0b2851d2067badf0d7e4ce  mg-3.5.tar.gz
+# Locally computed:
+sha256 7e12e5df4bae12cb21581ba157ced20e1986a0508dd10d0e8a4ab9a4cf94e85c  UNLICENSE

package/mg/mg.mk

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+################################################################################
+#
+# mg
+#
+################################################################################
+
+MG_VERSION = 3.5
+MG_SITE = https://github.com/troglobit/mg/releases/download/v$(MG_VERSION)
+MG_LICENSE = Public Domain
+MG_LICENSE_FILES = UNLICENSE
+
+ifeq ($(BR2_PACKAGE_NCURSES),y)
+MG_DEPENDENCIES += ncurses
+MG_CONF_OPTS += --with-curses
+else
+MG_CONF_OPTS += --without-curses
+endif
+
+$(eval $(autotools-package))