docs: update package documentation to strip elfs

Update build.md to specify that the boot image needs to be generated
using the stripped version of the Resource Manager and C Runtime output
binaries.

Signed-off-by: Stephany Gamiz <quic_sgamiz@quicinc.com>

Author: quic-sgamiz

docs/build.md

@@ -85,6 +85,12 @@ To clean the build, run `scons -c all=true`, or use configuration parameters to
 
 Once you have built the Gunyah Hypervisor, Resource Manager and C Runtime, a boot image can be prepared.
 
+To reduce the size of the boot image, the generated binaries of Resource Manager and C Runtime need to be stripped with the following commands:
+```bash
+$LLVM/bin/llvm-strip -o <path-to-resource-manager-src>/build/resource-manager.strip <path-to-resource-manager-src>/build/resource-manager
+$LLVM/bin/llvm-strip -o <path-to-c-runtime-src>/build/runtime.strip <path-to-c-runtime-src>/build/runtime
+```
+
 The individual executables generated by building [Gunyah Hypervisor](https://github.com/quic/gunyah-hypervisor), [Resource Manager](https://github.com/quic/gunyah-resource-manager), and [Gunyah C Runtime](https://github.com/quic/gunyah-c-runtime) need to be integrated into a single `hypvm.elf` boot image.
 
 You will need the [pyelftools](https://github.com/eliben/pyelftools) Python module, available from its upstream project:
@@ -97,8 +103,8 @@ To generate `hypvm.elf` boot image run these steps (substituting `<path>`s for e
 ```bash
 cd <path-to-gunyah-hypervisor-src>
 PYTHONPATH=<path-to-pyelftools>/pyelftools tools/elf/package_apps.py \
- -a <path-to-resource-manager-src>/build/resource-manager \
- -r <path-to-c-runtime-src>/build/runtime \
+ -a <path-to-resource-manager-src>/build/resource-manager.strip \
+ -r <path-to-c-runtime-src>/build/runtime.strip \
  <path-to-gunyah-hypervisor-src>/build/qemu/gunyah-rm-qemu/production/hyp.elf \
  -o <path-to-destination>/hypvm.elf
 ```