[Makefile.cache] fix an issue that non-direct dependencies are not ac…

…counted in component hash calculation (#8965)

#### Why I did it

Fixed an issue that changing SDK version leads to cache framework taking cached syncd RPC image rather then rebuilding syncd RPC based on new syncd with new SDK.

Investigation showed that cache framework calculates a component hash based on direct dependencies. Syncd RPC image hash consists of two parts: one is the flags of syncd RPC (platform, ENABLE_SYNCD_RPC) and syncd RPC direct dependencies makefiles. None of the syncd RPC direct dependencies are modified when SDK version changes, so hash is unchanged.

#### How I did it

To fix this issue, include the hash of dependencies into current component hash calculation, e.g.:

In calcultation of the hash ```docker-syncd-mlnx-rpc.gz-274dfed3f52f2effa9989fc-39344350436f9b06d28b470.tgz```, the hash of syncd is included: ```docker-syncd-mlnx.gz-48ee88ac54b201e0e107b15-7bbea320025177a2121e440.tgz``` in which the hash of SDK is included.

#### How to verify it

Build with cache enabled and check that changing SDK version leads to a different hash of syncd rpc image:

SDK version 4.5.1002:
```
docker-syncd-mlnx.gz-48ee88ac54b201e0e107b15-7bbea320025177a2121e440.tgz
docker-syncd-mlnx-rpc.gz-274dfed3f52f2effa9989fc-39344350436f9b06d28b470.tgz
```

SDK version 4.5.1002-005:
```
docker-syncd-mlnx.gz-18baf952e3e0eda7cda7c3c-e5668f4784390d5dffd55af.tgz
docker-syncd-mlnx-rpc.gz-4a6e59580eda110b5709449-552f76be135deaf750aeab2.tgz
```

Makefile.cache

@@ -182,7 +182,10 @@ define GET_MOD_DEP_SHA
 	$(eval $(1)_DEP_FILES_MISSING := $(filter-out $(wildcard $($(1)_DEP_MOD_SHA_FILES)),$($(1)_DEP_MOD_SHA_FILES)) )
 	$(if $($(1)_DEP_FILES_MISSING), $(warning "[ DPKG ] Dependecy file(s) are not found for $(1) : $($(1)_DEP_FILES_MISSING)))
 
-	$(eval $(1)_DEP_MOD_SHA := $(shell git hash-object  $($(1)_DEP_MOD_SHA_FILES) \
+	# Include package dependencies hash values into package hash calculation
+	$(eval $(1)_DEP_PKGS_SHA := $(foreach dfile,$(1)_MOD_DEP_PKGS,$(dfile)_DEP_MOD_SHA $(dfile)_MOD_HASH))
+
+	$(eval $(1)_DEP_MOD_SHA := $(shell bash -c "git hash-object  $($(1)_DEP_MOD_SHA_FILES) && echo $($(1)_DEP_PKGS_SHA)" \
                             | sha1sum | awk '{print substr($$1,0,23);}'))
 endef