[Tests] Mark check dependency tests cases 'REQUIRES: shell'

These test cases use shell variables etc.

(cherry picked from commit e32de78)

Author: rintaro

test/SourceKit/CodeComplete/complete_checkdeps_bridged.swift

@@ -5,6 +5,8 @@ func foo() {
   /*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: %empty-directory(%t/Frameworks)
 // RUN: %empty-directory(%t/MyProject)
 

test/SourceKit/CodeComplete/complete_checkdeps_clangmodule.swift

@@ -5,6 +5,8 @@ func foo() {
   /*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: %empty-directory(%t/Frameworks)
 // RUN: %empty-directory(%t/MyProject)
 

test/SourceKit/CodeComplete/complete_checkdeps_otherfile.swift

@@ -5,6 +5,8 @@ func foo() {
   /*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: %empty-directory(%t/Frameworks)
 // RUN: %empty-directory(%t/MyProject)
 

test/SourceKit/CodeComplete/complete_checkdeps_swiftmodule.swift

@@ -5,6 +5,8 @@ func foo() {
   /*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: %empty-directory(%t/Frameworks)
 // RUN: %empty-directory(%t/MyProject)
 

test/SourceKit/CodeComplete/complete_checkdeps_vfs.swift

@@ -2,6 +2,8 @@ func foo(value: MyStruct) {
   value./*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: DEPCHECK_INTERVAL=1
 // RUN: SLEEP_TIME=2
 

test/SourceKit/CodeComplete/complete_checkdeps_vfs_open.swift

@@ -2,6 +2,8 @@ func foo(value: MyStruct) {
   value./*HERE*/
 }
 
+// REQUIRES: shell
+
 // RUN: DEPCHECK_INTERVAL=1
 // RUN: SLEEP_TIME=2