Create embox_supported_platforms_qemu_en.md

Author: deryugina

en/platforms/embox_supported_platforms_qemu_en.md

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+## QEMU emulator support
+
+Embox supports following QEMUs:
+
+* qemu-system-i386
+* qemu-system-arm
+* qemu-system-mips
+* qemu-system-ppc
+* qemu-system-microblaze
+* qemu-system-sparc
+
+For each of supported CPU architectures you have to configure Embox by follow shell command:
+
+```
+        $ make confload-<ARCH>/qemu
+```
+where <ARCH>: x86, arm, mips, ppc, microblaze, sparc
+
+For running you should execute `auto_qemu` script:
+```
+        $ ./scripts/qemu/auto_qemu
+```
+The script parses config files from `conf/` folder and starts `qemu` with corresponded arguments.