TEST: use K64F run example test

- some examples not able run on L475 or F249 target due to missing storage/connectivity capability
- use K64F to run those example test

Author: Qinghao Shi

tools/test/examples/examples.json

@@ -106,7 +106,7 @@
       "sub-repo-example": false,
       "subs": [],
       "features" : [],
-      "targets" : ["K66F", "NUCLEO_F429ZI", "DISCO_F746NG"],
+      "targets" : ["K64F", "DISCO_F746NG"],
       "toolchains" : [],
       "exporters": [],
       "compile" : true,
@@ -194,7 +194,7 @@
         "sub-repo-example": false,
         "subs": [],
         "features" : [],
-        "targets" : ["DISCO_L475VG_IOT01A", "FVP_MPS2_M3"],
+        "targets" : ["NUCLEO_F429ZI", "FVP_MPS2_M3"],
         "toolchains" : [],
         "exporters": [],
         "compile" : true,
@@ -226,7 +226,7 @@
         "sub-repo-example": false,
         "subs": [],
         "features" : [],
-        "targets" : ["DISCO_L475VG_IOT01A", "FVP_MPS2_M3"],
+        "targets" : ["NUCLEO_F429ZI", "FVP_MPS2_M3"],
         "toolchains" : [],
         "exporters": [],
         "compile" : true,
@@ -258,7 +258,7 @@
         "sub-repo-example": false,
         "subs": [],
         "features" : [],
-        "targets" : ["DISCO_L475VG_IOT01A"],
+        "targets" : ["K64F"],
         "toolchains" : [],
         "exporters": [],
         "compile" : true,
@@ -402,7 +402,7 @@
         "sub-repo-example": false,
         "subs": [],
         "features" : [],
-        "targets" : ["DISCO_L475VG_IOT01A"],
+        "targets" : ["K64F"],
         "toolchains" : [],
         "exporters": [],
         "compile" : true,