adding device_context to blas deps list (#10420)

* adding operator to blas deps list

* use device_context instead to solve cycle deps

Author: putcn

paddle/fluid/operators/math/CMakeLists.txt

@@ -41,7 +41,7 @@ math_library(depthwise_conv)
 math_library(gru_compute DEPS activation_functions math_function)
 math_library(im2col)
 math_library(lstm_compute DEPS activation_functions)
-cc_library(blas SRCS blas.cc DEPS cblas framework_proto)
+cc_library(blas SRCS blas.cc DEPS cblas framework_proto device_context)
 math_library(math_function DEPS blas)
 math_library(maxouting)
 math_library(pooling)